Spiral-die.



y No. 651,748. Patented lune 12, |900.

H. mEnnonFF.

SPIRAL DIE. (No Model.) I (Applicatin @leid Oct. 6,1899.) 3 sheetssheetI,-

Kn IWNNIM .IHIUIIUNNIUI h I LJ P J' 7 P D o A, i i /y o m 03 s #D Y f 0I f 0 f 1 /22 l 7 Q Q l ZL'Q No. `65|.74a. PatentedY June l2, |900.L

H. mERuonFF. f

SPIBAL DIE.

(No Model.) 3 Sheets-Sheet 2.

www. mmlu ,Dief 0707 ff No. 65|,748. Patented lune I2, |900. H. B.DIERDDRFF.

SPIBL DIE.`

(Application med oct. 6, 1899.)

3 sheets-.sheet 3.

(no Model.)

A TTOH/VEY.

UNITED STATESv PATENT OFFICE.

HENRY B. DIERDORFF, OF COLUMBUS, OHIO, ASSIGNOR TO JOSEPH A. JEFFREY, OFSAMEy PLACE.

SPIRAL-DIE.

SPECIFICATION forming part of Letters Patent No; 651,748, dated June 1a,1900.

Application inea october e, 1399. seria No. 732,819. f (remodel.)

To @ZZ whom t 11a/tty concern:

Be it known that I, HENRY B. DIERDOEEE, a citizen of the United States,`residing at Columbus, in the county of Franklin and State of Ohio, haveinvented certain new and useful Improvements in Spiral-Dies, of whichthe following is' a specication, reference being had therein to theaccompanying drawings.

Figure l is a front elevation of a swaging or stamping mechanismembodying my improvements. Fig. 2 is a side elevation of the same. Fig.3 is a detached view of part of the die-lifting device. Fig. 4 is across-section on the line x fr of Fig. l. Figs. 5, 6, and 7 showdetails. Fig. 8 shows the initial sheetmetal blank. Figs; 9, 10, and l1illustrate the steps followed in shaping the blank before subjecting ittoV the swaging or stamping machine. Fig. 12 illustrates the blank afterit leaves the machine.

In the drawings the operative parts of the mechanism are shown asmounted upon a frame or bed. At the bottom of this frame there is aheavy base A, from which there eX- tend upward the standards B B, andthese are joined at the top by the cross-bar B'. i The base A ispreferably expanded at A to provide an enlarged horizontal table-likedevice at the center. Upon this is secured centrally the lower diemember or matrix C, and above this is supported movably the upper diemember D. The operative faces of these dies are so shaped as to describeor conform to the spiral or helical shape of the article to be pro-`duced.

The lower part of the operative face of theV lower die or matrix Ocolnmences at c and the projection or nose d is the lowest and therecessed end d is at the highest part. A comsultant being a spiralmovement of each point of its operative surface corresponding to thespiral shape to be produced by it upon the sheet met-al. Itis guided inits vertical movement by means of the guide-rod E, which rises fromand'is rigidly secured to the base A A',

there being a central verticalaperture in the upper die D to receivethis guide. It is moved vertically in the construction illustrated bymeans of a rope or cable F and a power-shaft G. The rope can beconnected to the die by any suitable device and extends upward from itsconnection to a Wheel or drum H on the drive-shaft G. This shaft isdriven in any suitable way-.for instance, by wheel I and belt r -androtates continuously. The rope F is taken once, twice, or more timesaround the Wheel or drum H, and its end is brought down to a pointsufficiently near the bottom of the machine to permit it to be graspedby the operator, it preferablyhaving a handle, such as at f, attached atthat end.

The die D,"as shown, has a" guiding and supporting arm or bar J securedto the upper' end of it and projecting therefrom upward to a suitabledistance. The rope F can be attached directly to this, though I preferto in: terpose a link or yoke K between them to insure flexibility. Theupwardly-extending arm or bar J also serves as a means for guiding thedie D in its rotating movements. For this purpose it is furnished withone or more helical, inclined, or spiral Iianges or splines L, extendingfrom the top to the bottom on spiral lines. .-M indicates the parts(preferably antifriction-rollers) of the stationary guideway for thespiral flanges or splines L, said rollers or guides M being held by barsfm, secured to the upright parts B of the frame or bed. Vhen the die andits carrying-bar J are rising or falling, a rotary movement around thevertical axis is imparted to them by these last-described devices.' f

The verticallymoving' parts above described can be supported whendesired as follows:

N are arms or wingsV extending out from the sides of the bar J.

O O are stops mounted in the upright parts B of the frame and adapted toslip into and out from the path of the arms N. Springs o IOO uponttie-beveledfaces o? push the stop3bars 'Y O outward and move up beyondthem. As soon as said arms N have reached points above the stops O thesprings o immediately thrust the latter to the normal position, and

the bars N are prevented from descending and heldin thisuppermostposition; i but the operator can when he desires instantly release themby withdrawing. the stops O `through the following device controlled byhis foot.

P P are bell-levers pivoted` to the main` frameandalso pivoted to one ofthe stops O,

A Q Qarelinksvpivoted to the levers P andA atzthein lower ends connectedto the pitmen R R; The latter are in turn pivoted to arms s of therock-shafts ofthe treadle device S,f

mounted near the bottom ofthe frame.

T indicates the original blank of sheet` metal. From the center of thisthere is punchedor cutout adisk of metal to leave anfaperturet, andthere is also .cut therein therslit att, the-blank after it is cutbeing. indicated by- T'. The blanks are then heated, andzafterheatingtheir edges adjacent to the slit-,15' are opened,.as shown in Fig. 1l,to provide apassage-way for the central guide-stem Eysofthat:the-blankcan be placed upon the spiralsurface of the matrix C. As soonas it' has beenfso placed lthe operator presses his foot` upon the'treadle atS and then, through the pit'manfR, the links Q,- and thebell-levers P, draws out the stops O,- and the die 4o gravity.

. faces'ofv the dies.:

D@ instantly descends under the .actionV of= It-impinges upontheblankfl" and presses it; to lconform to the shape of the surf The dieD-as itdescends is@ compelled bythe splines L and the rollersorf` guidesMzto rotate as well as descend,

and=the nose-or projection'd of the die D isj c' enabled to-pass; beyondthe vertical lineof the Anose c'of: the stationary matrix,and'consequentlyy theresnlting-,shape ofl-the sheet metall-is'- suchthati one end; thereof l slightly: overlaps .the other, as shown in Fig.12. This overlapping:` permits riveting one 'section-of;

thefspiraltoanother. A't the same time that theoperatorr'isthusallowingA they die to fall hef grasp's the rope F or `its handle f, `andshould v the metall require one or more supplemental'rblows they arecaused by his exerting slight downward pull onzthe rope Fand thenreleasing it, as thedownward pull increasesthe friction =of the/ropeupon theI revolving drum; and'gth'isiis instantly translated into anelevation of the die D, and upon his releasingn the-rope from thestrainv the die drops. Heis enabled in this way to give alargefnumberofrapid blowsin a brief period of time. As soon asethevsheettme-t-alisseentobe inthe proper` shapeiheIdraWs-fupon-therope1F continuouslylong,enough to cause ittolift. the partsD and J upward andunt vil the arms Nforcethe stops O and rest upon them, after which the piece of metal thathas been shaped is removed and another blank is applied.

At U thereis a device for. bending `the ends `'ofithe blanks T" from theshape idF-ig. 10 to that -nFig 1l. At V there are retaining or guidingdevices secured to the dies to prevent the-blanks from escaping from theposition in which they shouldy be held while forming. The die D isdetachably secured to its supl,port or carrierJ, and similarly the`lower die or matrix C isreinovably secnred to thebase or bed of thetrame. Each mechanism is providedwith a series of two or more pairs ofdies of difterentdiameters to correspond Awith' the dierent sizes ofVspiral'dblanksthatareto be formedtherewith.

By having the guide parts L and Mfexternaltothe die and to itssupport-orccarrierl can cause itto be rotated :withfa'greater Vleverageand more power than it` the spiralgulde were in the interiorof thedieoriholder. With v the parts arranged as shown the central guide vEmay be a simple cylindrical rodi or; stem tted intov an easily-boredlsocket inthe-die C and corresponding passage-way'bored'- lthe die -D andits holderl JL.

Of course it will` be.understoodthat'there canbe modifications inseveral respectsw-ithl out' departing4 from thefesscn'tialf features4,ofthe mechanism: The'gu'idingzparts f canbe inverted, .the rollersorequivalentsbeing put upon the die orholdergandthe feathersaon IOOsplines or equivalent groovesl can' beprovided-on the `frame. p

What I claim isl. Inamachine forfforming sheet-metal spirals, a pairofgdies each `havinga spiral operative face; andofwhich one isimovablelongitudinally'toward and fromftheot'h'er,and`

also movable-around itslongitudinal axis,snbstantially as setfrth.-

` Y 2; In Va machineforforming spiralsections of' sheet. 'meta-l; alpair ofI dies, formed with' spirally-sha'ped` operative 'facesgfand' oneofy which is movable toward'andfromlthe other, -and one of which islrotatable around their common axis, substantially assetfrthl` Y 3..In amachine for forming sheet-,metal Ispirals, aY die havinga'spiralffaceiextending aroundacentralfaxis, andof y aalength greaterthan one :com plete -turnzof thespiralaaround spirals, a. die-havingan'operativespiralface, l Vanzopposing die also havinganoperativespi;

IIC

ral face', and a guide or stop to prevent the outward escaping of theblanks from said spiral face, substantially as set forth.

6. The combination, with a die having a spiral operative face, of anopposing die having a spiral operative face, means for moving one ofsaid dies toward and from the other, means for turning one of said dies,and a friction-controlled connecting device for throwing the diemechanism into and out of operation, substantially as set forth.

7. In a machine forforming spiral metal sheets, a pair of dies, eachhaving a spiral operative face,and of which one is movable toward andfrom the other, in combination with an interior guide for said diesituated at its axis, and an exterior rotationcausing guide engagingtherewith, substantially as set forth.

8. In a machine for shaping sheet metal a rotating andlongitudinally-moving die, in combination with a spirally-arranged guideengaging with the die and situated outside thereof, substantially as setforth.

9. In a machine for shaping sheet metal a rotating and longitudinally-movin g die, a spirally-arranged guide feather or splineconnected to the die and external thereof and a stationary guidewayengaging with said guide, substantially as set forth.

10. In a machine for shaping sheet metal, a rotating andlongitudinally-moving die, and a similarly-moving die-support, to whichthe die is detachably secured, a spirally-arranged guide feather orspline externally connected to the die-support, and a positively-actingstop for the die-support to prevent its downward movement, substantiallyas set forth.

1l. In a machine for shaping sheet metal the combination of a lower dieor matrix, an upper rotating and longitudinally-moving die, asimilarly-moving support for the die, a centrally-arranged guide for themovable die, an externally-arranged spiral guide for the mov able die,and a positive stop for holding the movable die against movement,substantially as set forth.

12. The combination of the frame, the die or matrix C removably fastenedto the frame, the guide E at the center of said die, the rotating andlongitudinally-moving die D, the support J for the die D detachablyconnected thereto, and iitted to the said guide E, the externalspirally-arrang'ed guide, and the friction-controlled mechanism formoving the die E, substantially as set forth.

13. The combination of a die having a spiral operative face, an opposingdie having a spiral operative face, means for moving one of said dieslongitudinally, and means for turning one of said dies around alongitudinal axis, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY B. DIERDORFF.

Vitnesses:

A. D. SHAW, F. E. CoLToN.

